But a funny thing is......years ago they had an earthquake in a city called Newcastle, which is sort of half way between where I live and Sydney.
It was a one off earthquake, did quite a bit of damage to Newcastle, as it's a very old city, lots of old buildings in it. So it took us Aussies by surprise, that we could ever have an earthquake like that.
They mine a lot of coal there, as they also do in Campbelltown (in my previous post).
Because I collect fossils as a hobby, I have lots of Geological maps that I consult from time to time. These maps also indicate fault lines.....and Newcastle and Campbelltown have lots of them.....so I guess those faults get a little restless from time to time.